To control by licence the custody, use, manufacture, importation, transportation, distribution, exportation and disposal of radioactive substances, irradiating apparatus and other sources of ionising radiation.

To assist in the development of national plans for emergencies arising from nuclear accidents and to act in support of such plans.

To provide a radioactivity measurement and certification service.

To prepare codes and regulations for the safe use of ionising radiation.

To carry out and promote research in relevant fields.

To monitor developments abroad relating to nuclear installations and radiological safety generally, and to keep the Government informed of their implications for Ireland.

To co-operate with the relevant authorities in other states and with appropriate international organisations.

To represent the State on international bodies.

To be the competent authority under international conventions on nuclear matters.